Queen guitarist Brian May, writing on a special Google blog, said: "Freddie would have been 65 this year, and even though physically he is not here, his presence seems more potent than ever. Freddie made the last person at the back of the furthest stand in a stadium feel that he was connected. He gave people proof that a man could achieve his dreams."

Doodle designer Ryan Germick added: "The video has a lot of fun, goofy stuff to celebrate what an incredible song writer, fashion icon, and musical innovator he was."

Mercury endured a lengthy battle with HIV before his death in 1991 at the age of 45.

In another celebration, London's Dominion Theatre is hosting a West End Summer Tea Party For Freddie For A Day with a rare chance to view Mercury's personal stamp collection In aid of the Mercury Phoenix Trust.

The Dominion, home of the hit musical musical We Will Rock You based on Mercury and Queen songs, is joining in by recreating for the day a famous Freddie's birthday - his 40th birthday in 1986 when Freddie threw a Summer Garden Party and welcomed close friends to the lawns of his Kensington lodge house, all of whom had been previously told to "wear a hat".

There will be special footage of Mercury on a specially installed video wall and a stamp collection courtesy of The British Postal Museum & Archive.

Car manufacturer Lotus has produced a one-off Evora S in honour of Mercury. The coupe, painted pearl white with red and gold accents, features the Queen frontman's signature. The cabin is yellow as an homage to Mercury's 1986 stage costume and the seats feature a Union Jack.

The car will be auctioned off for charity as part of the celebrations tied to Mercury's 65th birthday party at the Savoy Hotel. Proceeds from the auction will go to benefit the Mercury Phoenix Trust, an HIV AIDS charity founded by bandmates Brian May, Roger Taylor and Queen manager Jim Beach after Mercury's death. The event will also feature donations from May and Taylor as well as Top Gear, watchmaker Raymond Weil and the Nelson Mandela Foundation.